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Description
The 3500/45 Position Monitor is a 4-channel instrument that accepts input from proximity transducers, Rotary Position Transducers (RPTs), DC Linear Variable Differential Transformers (DC LVDTs), AC Linear Variable Differential Transformers (AC LVDTs), and rotary potentiometers. The monitor conditions the input and compares the conditioned signals with user-programmable alarms.
The type of measurement and transducer input determine which I/O modules are required. See Transducer Types for Position Measurements on page 10., See Figures and Graphs on page 12., and See I/O Modules for AC LVDTs and Rotary Potentimeters on page 14.

You can program each channel using the 3500 Rack Configuration Software to perform the following functions:
Axial (thrust) Position
Differential Expansion
Standard Single Ramp Differential Expansion
Non-standard Single Ramp Differential Expansion
Dual Ramp Differential Expansion
Complementary Differential Expansion
Case Expansion
Valve Position

The monitor channels are programmed in pairs and can perform up to two of these functions at a time. For example, Channels 1 and 2 can perform one function while channels 3 and 4 may perform the same or a different function.

The primary purpose of the 3500/45 Position Monitor is to provide the following:
Machinery protection by continuously comparing monitored parameters against configured alarm setpoints to drive alarms

Essential machine information for operations and maintenance personnel

Each channel, depending on configuration, typically conditions its input signal to generate various parameters called measured variables. You can establish alert setpoints for each active measured variable and danger setpoints for any two of the active measured variables.

Ordering Information
For the detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (108M1756) available from Bently.com.
Position Monitor3500/45-AA-BB

A: I/O Module Type
01 Position I/O Module with Internal Terminations (Proximitor, RPT, DC LVDT)
02 Position I/O Module with External Terminations (Proximitor, RPT, DC LVDT)
03 Discrete TMR Position I/O Module with External Terminations (Proximitor or DC LVDT)
04 Bussed TMR Position I/O Module with External Terminations (Proximitor)
05 AC LVDT Position I/O Module with Internal Terminations
06 AC LVDT Position I/O Module with External Terminations
07 Rotary Potentiometer Position I/O Module with Internal Terminations
08 Rotary Potentiometer Position I/O Module with External Terminations

B: Agency Approval
00 None
01 CSA / NRTL / C (Class 1, Division 2)
02 ATEX / IECEx / CSA (Class 1, Zone 2)

You must order external termination blocks and cables separately for each I/O module with external termination.

When using the 3500/45 Position Monitor in a TMR application, valve position measurement are not available, and case expansion measurements are only supported for Discrete TMR.

Spares
176449-04 3500/45 Position Monitor
135137-01 Position I/O Module with Internal Terminations for use with Proximitors, RPTs or DC LVDTs
135145-01 Position I/O Module with External Terminations for use with Proximitors, RPTs or DC LVDTs
139554-01 AC LVDT Position I/O Module with Internal Terminations for use with AC LVDTs

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